Stator is bolted to both halves of the cases from what I remember, the flywheel was a bitch to remove (I remember that) I would remove the clutch & basket too,as the oilpump drive chain runs behind the basket. Much easier to install lower case half back on to upper with less "stuff" in the way. Easier to get the Yamabond 3 on the upper case half too, and for cleaning the old stuff off. Be sure the clutch basket is fully seated when reinstalling too, as it drives the oil pump. My '00 R1's oilpump drive chain was loose, I replaced the chain and both gears,but it was still loose IMO.